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Kovar alloy and tungsten copper alloy connecting method

A tungsten-copper alloy and alloy technology, which is applied in the connection field of Kovar alloy and tungsten-copper alloy, can solve the problems such as failure to meet the application requirements of the connection joint between Kovar alloy and tungsten-copper alloy, reduction of joint performance, residual thermal stress, etc. Achieve the effect of small residual thermal stress, low production cost and short time consumption

Inactive Publication Date: 2019-08-27
SUZHOU SAITERUI PRECISION MACHINERY PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, at present, brazing is the most commonly used connection between Kovar alloy and tungsten-copper materials. The brazing process is complex, time-consuming, and high in production costs. At the same time, brazing will generate residual thermal stress after welding, which will reduce the performance of the joint. In turn, the joint is unreliable and cannot meet the application requirements of the connection joint between Kovar alloy and tungsten copper alloy

Method used

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  • Kovar alloy and tungsten copper alloy connecting method
  • Kovar alloy and tungsten copper alloy connecting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Put the Kovar alloy and tungsten-copper alloy to be joined into acetone and ultrasonically clean them for 17 minutes.

[0037] Sprinkle the solder evenly around the edges of the Kovar alloy to be connected, with a height of 1.5mm and a width of 1mm. The tolerance between the Kovar alloy and the tungsten-copper alloy is 0.0005mm.

[0038] Place the Kovar alloy, tungsten-copper alloy and solder in a 50Pa heating furnace, and raise the temperature from room temperature to 875°C at a rate of 10°C / min, and then keep it warm for 30min.

[0039] Fill the heating furnace with high-purity argon until the pressure in the heating furnace rises to 3.5 MPa.

[0040] The Kovar alloy, tungsten-copper alloy and solder are heated up to 1040°C to realize the connection between the Kovar alloy and the tungsten-copper alloy.

[0041] The joint obtained by adopting the method of this embodiment is complete and dense, without defects such as cracks, and realizes the reliable connection betw...

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Abstract

The invention relates to a kovar alloy and tungsten copper alloy connecting method. The kovar alloy and tungsten copper alloy connecting method comprises the following steps of cleaning, filling welding flux, preheating, pressurizing and heating. The kovar alloy and tungsten copper alloy connecting method has the advantages of simple process, time saving, low production cost and high production efficiency, and additionally, the thermal residual stress of a joint is small, so that the performance of the joint is good, the joint is reliable, and the application requirement of the kovar alloy andtungsten copper alloy connecting joint can be met.

Description

technical field [0001] The invention relates to the technical field of connection of heterogeneous materials, in particular to a connection method of Kovar alloy and tungsten-copper alloy. Background technique [0002] Kovar alloy has a linear expansion coefficient similar to that of hard glass in the range of 20-450 °C, and can be effectively sealed and matched with the corresponding hard glass. It also has a high Curie point and good low-temperature structural stability, but its Low thermal conductivity. With the development of the electronics industry, the requirements for heat sink materials are getting higher and higher, especially the requirements for thermal conductivity. Tungsten copper material has a linear expansion coefficient similar to that of Kovar alloy, and the thermal conductivity is higher than that of Kovar alloy 4. -5 times, but its density is about 2 times that of Kovar alloy, and the price of tungsten copper material is about 3 times that of Kovar allo...

Claims

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Application Information

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IPC IPC(8): B23K1/19
CPCB23K1/19
Inventor 祁万章
Owner SUZHOU SAITERUI PRECISION MACHINERY PARTS CO LTD
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